7,921 research outputs found
Pengaruh Latihan Wall Drills terhadap Kemampuan Tendangan Naeryo Chagi
The purpose of this study was to determine whether the effect of wall drills training on the ability to kick naeryo chagipada extracurricular Tae Kwon Do High School river candle. The method used in this study was a pure experimental method due to randomization, the experimental group (treatment) and the control group. Population in this study is all students who take extracurricular Tae Kwon Do, amounting to 20 people, each student 10 people as an experimental class and 10 people as a control class. Samples are given wall drills for 4 weeks with a frequency of 3 times a week. After 4 weeks there is an effect of wall drills training on the ability of naeryo chagi kicks in the Tae Kwon Do sport, which is an average posttest score of 34.2 with a difference of 4.2, and an average posttest result of 32.1 with a difference of 2 , 1. tcount 7.20> t table 1.73. Conclusion, that the wall drills exercise affects the ability of naeryo chagi kicks in Ta Kwon Do's extracurricular activities
Keywords: Wall Drills, Kick, Naeryo Chang
The Physical Significance of Singularities in the Chern--Simons Fermi Liquid Description of a Partially Filled Landau Level
We analyze the linear response of a half filled Landau level to long
wavelength and low frequency driving forces, using Fermi liquid theory for
composite fermions. This response is determined by the composite fermions
quasi--particle effective mass, , and quasi--particle Landau interaction
function . Analyzing infra--red divergences of perturbation
theory, we get an exact expression for , and conjecture the form of the
. We then conclude that in the limit of infinite cyclotron
frequency, and small , the composite fermion excitation
spectrum is continuous for , with
an unknown number. For fractional quantum Hall states near a half
filled Landau level, we derive an exact expression for the energy gap.Comment: 4 pages, RevTeX. This paper, being short and non-technical, could
serve as a useful starting point for reading our manuscript cond-mat/9502032.
The present paper does, however, include results not published in the forme
A new approach to evaluate residual stress using instrumented indentation testing at nano scale
In structural integrity, residual stress is one of the major factors affecting structure failure. In particular, tensile residual stress accelerates crack growth and reduces integrity. Hence test methods have been devised that can quantitatively evaluate residual stresses, including X-ray diffraction, hole-drilling, and contour methods. Now a relatively new technique, instrumented indentation testing, can be used to quantitatively evaluate the surface residual stress of a structure semi-nondestructively with mechanical response causing small indents. Many studies have confirmed that indentation load-displacement curves are shifted depending on the residual stress state. For the same indentation depth, a larger indentation load is required for a compressive residual stress state, and a smaller indentation load is required for a tensile residual stress state, in contrast to the stress-free state. Thus, for the same indentation depth, there is a difference in indentation load between the stressed and stress-free states. Kwon and Lee have suggested and verified experimentally that, among the surface residual stress components, a deviatoric stress term parallel to the indentation axis induces a virtual force that affects the plastic deformation occurring during indentation, and consequently also affects the indentation load-displacement curve. [1] In this paper, principle and application for measuring residual stress by IIT at multi-scale will be included. References
[1] Y.-H. Lee and D. Kwon, “Estimation of biaxial surface stress by instrumented indentation with sharp indenters”, Acta Materialia 52. 1555-1563, 2004
Entanglement amplification of fermionic systems in an accelerated frame
In this article we present an analysis to derive physical results in the
entanglement amplification of fermonic systems in the relativistic regime, that
is, beyond the single-mode approximation. This leads a recent work in [M.
Montero and E. Mart\'{i}n-Mart\'{i}nez, JEHP 07 (2011) 006] to a physical
result, and solidifies that phenomenon of entanglement amplification can
actually happen in the relativistic regime
Entanglement behavior of quantum states of fermionic system in accelerated frame
In this article we investigate the entanglement behavior of quantum states of
fermionic system in accelerated frame. It was known that unlike scalar case the
entanglement of fermionic maximally entangled states survives even in the
infinite acceleration limit. Also for the fermionic system it was discussed
that one may consider the approach beyond single mode approximation. However
due to the peculiar property of fermionic system there has been different
opinions about correct physical structure of fermionic system. Recently Montero
and Mart\'{i}n-Mart\'{i}nez suggested an approach beyond single mode
approximation. Using the structure proposed by Montero and
Mart\'{i}n-Mart\'{i}nez we investigate the entanglement behavior of quantum
states of fermionic system in accelerated frame. We find that the approach by
Montero and Mart\'{i}n-Mart\'{i}nez seems to work appropriately. Also we may
obtain the proper entanglement behavior of quantum states in fermionic system
in accelerated frame(our result may correct the previous results published in
Phys.Rev.A 83 052306)
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